Commit | Line | Data |
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c2345207 RP |
1 | /* |
2 | * VFW capture interface | |
3 | * Copyright (c) 2006-2008 Ramiro Polla. | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include "avformat.h" | |
23 | #include <vfw.h> | |
24 | #include <windows.h> | |
25 | ||
26 | //#define DEBUG_VFW | |
27 | ||
28 | /* Defines for VFW missing from MinGW. | |
29 | * Remove this when MinGW incorporates them. */ | |
30 | #define WM_CAP_START (0x0400) | |
31 | #define WM_CAP_SET_CALLBACK_VIDEOSTREAM (WM_CAP_START + 6) | |
32 | #define WM_CAP_DRIVER_CONNECT (WM_CAP_START + 10) | |
33 | #define WM_CAP_DRIVER_DISCONNECT (WM_CAP_START + 11) | |
34 | #define WM_CAP_GET_VIDEOFORMAT (WM_CAP_START + 44) | |
35 | #define WM_CAP_SET_VIDEOFORMAT (WM_CAP_START + 45) | |
36 | #define WM_CAP_SET_PREVIEW (WM_CAP_START + 50) | |
37 | #define WM_CAP_SET_OVERLAY (WM_CAP_START + 51) | |
38 | #define WM_CAP_SEQUENCE_NOFILE (WM_CAP_START + 63) | |
39 | #define WM_CAP_SET_SEQUENCE_SETUP (WM_CAP_START + 64) | |
40 | #define WM_CAP_GET_SEQUENCE_SETUP (WM_CAP_START + 65) | |
41 | ||
42 | #define HWND_MESSAGE ((HWND)-3) | |
43 | ||
44 | #define BI_RGB 0 | |
45 | ||
46 | typedef struct videohdr_tag { | |
47 | LPBYTE lpData; | |
48 | DWORD dwBufferLength; | |
49 | DWORD dwBytesUsed; | |
50 | DWORD dwTimeCaptured; | |
51 | DWORD dwUser; | |
52 | DWORD dwFlags; | |
53 | DWORD_PTR dwReserved[4]; | |
54 | } VIDEOHDR, NEAR *PVIDEOHDR, FAR * LPVIDEOHDR; | |
55 | ||
56 | typedef struct { | |
57 | DWORD dwRequestMicroSecPerFrame; | |
58 | BOOL fMakeUserHitOKToCapture; | |
59 | UINT wPercentDropForError; | |
60 | BOOL fYield; | |
61 | DWORD dwIndexSize; | |
62 | UINT wChunkGranularity; | |
63 | BOOL fUsingDOSMemory; | |
64 | UINT wNumVideoRequested; | |
65 | BOOL fCaptureAudio; | |
66 | UINT wNumAudioRequested; | |
67 | UINT vKeyAbort; | |
68 | BOOL fAbortLeftMouse; | |
69 | BOOL fAbortRightMouse; | |
70 | BOOL fLimitEnabled; | |
71 | UINT wTimeLimit; | |
72 | BOOL fMCIControl; | |
73 | BOOL fStepMCIDevice; | |
74 | DWORD dwMCIStartTime; | |
75 | DWORD dwMCIStopTime; | |
76 | BOOL fStepCaptureAt2x; | |
77 | UINT wStepCaptureAverageFrames; | |
78 | DWORD dwAudioBufferSize; | |
79 | BOOL fDisableWriteCache; | |
80 | UINT AVStreamMaster; | |
81 | } CAPTUREPARMS; | |
82 | /* End of missing MinGW defines */ | |
83 | ||
84 | struct vfw_ctx { | |
85 | HWND hwnd; | |
86 | HANDLE mutex; | |
87 | HANDLE event; | |
88 | AVPacketList *pktl; | |
89 | AVFormatContext *s; | |
90 | unsigned int curbufsize; | |
91 | unsigned int frame_num; | |
92 | }; | |
93 | ||
94 | static enum PixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount) | |
95 | { | |
96 | switch(biCompression) { | |
97 | case MKTAG('Y', 'U', 'Y', '2'): | |
98 | return PIX_FMT_YUYV422; | |
23ef6da8 RP |
99 | case MKTAG('I', '4', '2', '0'): |
100 | return PIX_FMT_YUV420P; | |
c2345207 RP |
101 | case BI_RGB: |
102 | switch(biBitCount) { /* 1-8 are untested */ | |
103 | case 1: | |
104 | return PIX_FMT_MONOWHITE; | |
105 | case 4: | |
106 | return PIX_FMT_RGB4; | |
107 | case 8: | |
108 | return PIX_FMT_RGB8; | |
109 | case 16: | |
110 | return PIX_FMT_RGB555; | |
111 | case 24: | |
112 | return PIX_FMT_BGR24; | |
113 | case 32: | |
114 | return PIX_FMT_RGB32; | |
115 | } | |
116 | } | |
117 | return -1; | |
118 | } | |
119 | ||
120 | #define dstruct(pctx, sname, var, type) \ | |
121 | av_log(pctx, AV_LOG_DEBUG, #var":\t%"type"\n", sname->var) | |
122 | ||
123 | static void dump_captureparms(AVFormatContext *s, CAPTUREPARMS *cparms) | |
124 | { | |
125 | av_log(s, AV_LOG_DEBUG, "CAPTUREPARMS\n"); | |
126 | dstruct(s, cparms, dwRequestMicroSecPerFrame, "lu"); | |
127 | dstruct(s, cparms, fMakeUserHitOKToCapture, "d"); | |
128 | dstruct(s, cparms, wPercentDropForError, "u"); | |
129 | dstruct(s, cparms, fYield, "d"); | |
130 | dstruct(s, cparms, dwIndexSize, "lu"); | |
131 | dstruct(s, cparms, wChunkGranularity, "u"); | |
132 | dstruct(s, cparms, fUsingDOSMemory, "d"); | |
133 | dstruct(s, cparms, wNumVideoRequested, "u"); | |
134 | dstruct(s, cparms, fCaptureAudio, "d"); | |
135 | dstruct(s, cparms, wNumAudioRequested, "u"); | |
136 | dstruct(s, cparms, vKeyAbort, "u"); | |
137 | dstruct(s, cparms, fAbortLeftMouse, "d"); | |
138 | dstruct(s, cparms, fAbortRightMouse, "d"); | |
139 | dstruct(s, cparms, fLimitEnabled, "d"); | |
140 | dstruct(s, cparms, wTimeLimit, "u"); | |
141 | dstruct(s, cparms, fMCIControl, "d"); | |
142 | dstruct(s, cparms, fStepMCIDevice, "d"); | |
143 | dstruct(s, cparms, dwMCIStartTime, "lu"); | |
144 | dstruct(s, cparms, dwMCIStopTime, "lu"); | |
145 | dstruct(s, cparms, fStepCaptureAt2x, "d"); | |
146 | dstruct(s, cparms, wStepCaptureAverageFrames, "u"); | |
147 | dstruct(s, cparms, dwAudioBufferSize, "lu"); | |
148 | dstruct(s, cparms, fDisableWriteCache, "d"); | |
149 | dstruct(s, cparms, AVStreamMaster, "u"); | |
150 | } | |
151 | ||
152 | static void dump_videohdr(AVFormatContext *s, VIDEOHDR *vhdr) | |
153 | { | |
154 | #ifdef DEBUG_VFW | |
155 | av_log(s, AV_LOG_DEBUG, "VIDEOHDR\n"); | |
156 | dstruct(s, vhdr, lpData, "p"); | |
157 | dstruct(s, vhdr, dwBufferLength, "lu"); | |
158 | dstruct(s, vhdr, dwBytesUsed, "lu"); | |
159 | dstruct(s, vhdr, dwTimeCaptured, "lu"); | |
160 | dstruct(s, vhdr, dwUser, "lu"); | |
161 | dstruct(s, vhdr, dwFlags, "lu"); | |
162 | dstruct(s, vhdr, dwReserved[0], "lu"); | |
163 | dstruct(s, vhdr, dwReserved[1], "lu"); | |
164 | dstruct(s, vhdr, dwReserved[2], "lu"); | |
165 | dstruct(s, vhdr, dwReserved[3], "lu"); | |
166 | #endif | |
167 | } | |
168 | ||
169 | static void dump_bih(AVFormatContext *s, BITMAPINFOHEADER *bih) | |
170 | { | |
171 | av_log(s, AV_LOG_DEBUG, "BITMAPINFOHEADER\n"); | |
172 | dstruct(s, bih, biSize, "lu"); | |
173 | dstruct(s, bih, biWidth, "ld"); | |
174 | dstruct(s, bih, biHeight, "ld"); | |
175 | dstruct(s, bih, biPlanes, "d"); | |
176 | dstruct(s, bih, biBitCount, "d"); | |
177 | dstruct(s, bih, biCompression, "lu"); | |
178 | av_log(s, AV_LOG_DEBUG, " biCompression:\t\"%.4s\"\n", | |
179 | (char*) &bih->biCompression); | |
180 | dstruct(s, bih, biSizeImage, "lu"); | |
181 | dstruct(s, bih, biXPelsPerMeter, "lu"); | |
182 | dstruct(s, bih, biYPelsPerMeter, "lu"); | |
183 | dstruct(s, bih, biClrUsed, "lu"); | |
184 | dstruct(s, bih, biClrImportant, "lu"); | |
185 | } | |
186 | ||
187 | static int shall_we_drop(struct vfw_ctx *ctx) | |
188 | { | |
189 | AVFormatContext *s = ctx->s; | |
190 | const uint8_t dropscore[] = {62, 75, 87, 100}; | |
191 | const int ndropscores = sizeof(dropscore)/sizeof(dropscore[0]); | |
192 | unsigned int buffer_fullness = (ctx->curbufsize*100)/s->max_picture_buffer; | |
193 | ||
d76c3e07 | 194 | if(dropscore[++ctx->frame_num%ndropscores] <= buffer_fullness) { |
c2345207 RP |
195 | av_log(ctx->s, AV_LOG_ERROR, |
196 | "real-time buffer %d%% full! frame dropped!\n", buffer_fullness); | |
197 | return 1; | |
198 | } | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
203 | static LRESULT CALLBACK videostream_cb(HWND hwnd, LPVIDEOHDR vdhdr) | |
204 | { | |
205 | struct vfw_ctx *ctx; | |
206 | AVPacketList **ppktl, *pktl_next; | |
207 | ||
208 | ctx = (struct vfw_ctx *) GetWindowLongPtr(hwnd, GWLP_USERDATA); | |
209 | ||
210 | dump_videohdr(ctx->s, vdhdr); | |
211 | ||
212 | if(shall_we_drop(ctx)) | |
213 | return FALSE; | |
214 | ||
215 | WaitForSingleObject(ctx->mutex, INFINITE); | |
216 | ||
217 | pktl_next = av_mallocz(sizeof(AVPacketList)); | |
218 | if(!pktl_next) | |
219 | goto fail; | |
220 | ||
221 | if(av_new_packet(&pktl_next->pkt, vdhdr->dwBytesUsed) < 0) { | |
222 | av_free(pktl_next); | |
223 | goto fail; | |
224 | } | |
225 | ||
226 | pktl_next->pkt.pts = vdhdr->dwTimeCaptured; | |
227 | memcpy(pktl_next->pkt.data, vdhdr->lpData, vdhdr->dwBytesUsed); | |
228 | ||
229 | for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next); | |
230 | *ppktl = pktl_next; | |
231 | ||
232 | ctx->curbufsize += vdhdr->dwBytesUsed; | |
233 | ||
234 | SetEvent(ctx->event); | |
235 | ReleaseMutex(ctx->mutex); | |
236 | ||
237 | return TRUE; | |
238 | fail: | |
239 | ReleaseMutex(ctx->mutex); | |
240 | return FALSE; | |
241 | } | |
242 | ||
243 | static int vfw_read_close(AVFormatContext *s); | |
244 | ||
245 | static int vfw_read_header(AVFormatContext *s, AVFormatParameters *ap) | |
246 | { | |
247 | struct vfw_ctx *ctx = s->priv_data; | |
248 | AVCodecContext *codec; | |
249 | AVStream *st; | |
250 | int devnum; | |
251 | int bisize; | |
252 | BITMAPINFO *bi; | |
253 | CAPTUREPARMS cparms; | |
254 | DWORD biCompression; | |
255 | WORD biBitCount; | |
256 | int width; | |
257 | int height; | |
258 | int ret; | |
259 | ||
260 | if(!ap->time_base.den) { | |
261 | av_log(s, AV_LOG_ERROR, "A time base must be specified.\n"); | |
262 | return AVERROR_IO; | |
263 | } | |
264 | ||
265 | ctx->s = s; | |
266 | ||
267 | ctx->hwnd = capCreateCaptureWindow(NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, 0); | |
268 | if(!ctx->hwnd) { | |
269 | av_log(s, AV_LOG_ERROR, "Could not create capture window.\n"); | |
270 | return AVERROR_IO; | |
271 | } | |
272 | ||
273 | /* If atoi fails, devnum==0 and the default device is used */ | |
274 | devnum = atoi(s->filename); | |
275 | ||
276 | ret = SendMessage(ctx->hwnd, WM_CAP_DRIVER_CONNECT, devnum, 0); | |
277 | if(!ret) { | |
278 | av_log(s, AV_LOG_ERROR, "Could not connect to device.\n"); | |
279 | DestroyWindow(ctx->hwnd); | |
280 | return AVERROR(ENODEV); | |
281 | } | |
282 | ||
283 | SendMessage(ctx->hwnd, WM_CAP_SET_OVERLAY, 0, 0); | |
284 | SendMessage(ctx->hwnd, WM_CAP_SET_PREVIEW, 0, 0); | |
285 | ||
286 | ret = SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, | |
287 | (LPARAM) videostream_cb); | |
288 | if(!ret) { | |
289 | av_log(s, AV_LOG_ERROR, "Could not set video stream callback.\n"); | |
76c2662b | 290 | goto fail_io; |
c2345207 RP |
291 | } |
292 | ||
293 | SetWindowLongPtr(ctx->hwnd, GWLP_USERDATA, (LONG_PTR) ctx); | |
294 | ||
295 | st = av_new_stream(s, 0); | |
296 | if(!st) { | |
297 | vfw_read_close(s); | |
298 | return AVERROR_NOMEM; | |
299 | } | |
300 | ||
301 | /* Set video format */ | |
302 | bisize = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, 0, 0); | |
e4d286f1 | 303 | if(!bisize) |
76c2662b | 304 | goto fail_io; |
c2345207 RP |
305 | bi = av_malloc(bisize); |
306 | if(!bi) { | |
307 | vfw_read_close(s); | |
308 | return AVERROR_NOMEM; | |
309 | } | |
310 | ret = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, bisize, (LPARAM) bi); | |
e4d286f1 | 311 | if(!ret) |
e110f486 | 312 | goto fail_bi; |
c2345207 RP |
313 | |
314 | dump_bih(s, &bi->bmiHeader); | |
315 | ||
316 | width = ap->width ? ap->width : bi->bmiHeader.biWidth ; | |
317 | height = ap->height ? ap->height : bi->bmiHeader.biHeight; | |
318 | bi->bmiHeader.biWidth = width ; | |
319 | bi->bmiHeader.biHeight = height; | |
320 | ||
321 | ret = SendMessage(ctx->hwnd, WM_CAP_SET_VIDEOFORMAT, bisize, (LPARAM) bi); | |
322 | if(!ret) { | |
323 | av_log(s, AV_LOG_ERROR, "Could not set Video Format.\n"); | |
e110f486 | 324 | goto fail_bi; |
c2345207 RP |
325 | } |
326 | ||
327 | biCompression = bi->bmiHeader.biCompression; | |
328 | biBitCount = bi->bmiHeader.biBitCount; | |
329 | ||
330 | av_free(bi); | |
331 | ||
332 | /* Set sequence setup */ | |
333 | ret = SendMessage(ctx->hwnd, WM_CAP_GET_SEQUENCE_SETUP, sizeof(cparms), | |
334 | (LPARAM) &cparms); | |
e4d286f1 | 335 | if(!ret) |
76c2662b | 336 | goto fail_io; |
c2345207 RP |
337 | |
338 | dump_captureparms(s, &cparms); | |
339 | ||
340 | cparms.fYield = 1; // Spawn a background thread | |
341 | cparms.dwRequestMicroSecPerFrame = | |
342 | (ap->time_base.num*1000000) / ap->time_base.den; | |
343 | cparms.fAbortLeftMouse = 0; | |
344 | cparms.fAbortRightMouse = 0; | |
345 | cparms.fCaptureAudio = 0; | |
346 | cparms.vKeyAbort = 0; | |
347 | ||
348 | ret = SendMessage(ctx->hwnd, WM_CAP_SET_SEQUENCE_SETUP, sizeof(cparms), | |
349 | (LPARAM) &cparms); | |
e4d286f1 | 350 | if(!ret) |
76c2662b | 351 | goto fail_io; |
c2345207 RP |
352 | |
353 | codec = st->codec; | |
354 | codec->time_base = ap->time_base; | |
355 | codec->codec_type = CODEC_TYPE_VIDEO; | |
356 | codec->width = width; | |
357 | codec->height = height; | |
358 | codec->codec_id = CODEC_ID_RAWVIDEO; | |
359 | codec->pix_fmt = vfw_pixfmt(biCompression, biBitCount); | |
360 | if(biCompression == BI_RGB) | |
361 | codec->bits_per_sample = biBitCount; | |
362 | ||
363 | av_set_pts_info(st, 32, 1, 1000); | |
364 | ||
365 | if(codec->pix_fmt == -1) { | |
366 | av_log(s, AV_LOG_ERROR, "Unknown compression type." | |
367 | "Please report verbose (-v 99) debug information.\n"); | |
368 | vfw_read_close(s); | |
369 | return AVERROR_PATCHWELCOME; | |
370 | } | |
371 | ||
372 | ctx->mutex = CreateMutex(NULL, 0, NULL); | |
373 | if(!ctx->mutex) { | |
374 | av_log(s, AV_LOG_ERROR, "Could not create Mutex.\n" ); | |
76c2662b | 375 | goto fail_io; |
c2345207 RP |
376 | } |
377 | ctx->event = CreateEvent(NULL, 1, 0, NULL); | |
378 | if(!ctx->event) { | |
379 | av_log(s, AV_LOG_ERROR, "Could not create Event.\n" ); | |
76c2662b | 380 | goto fail_io; |
c2345207 RP |
381 | } |
382 | ||
383 | ret = SendMessage(ctx->hwnd, WM_CAP_SEQUENCE_NOFILE, 0, 0); | |
384 | if(!ret) { | |
385 | av_log(s, AV_LOG_ERROR, "Could not start capture sequence.\n" ); | |
76c2662b | 386 | goto fail_io; |
c2345207 RP |
387 | } |
388 | ||
389 | return 0; | |
76c2662b | 390 | |
e110f486 RP |
391 | fail_bi: |
392 | av_free(bi); | |
393 | ||
76c2662b RP |
394 | fail_io: |
395 | vfw_read_close(s); | |
396 | return AVERROR_IO; | |
c2345207 RP |
397 | } |
398 | ||
399 | static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt) | |
400 | { | |
401 | struct vfw_ctx *ctx = s->priv_data; | |
402 | AVPacketList *pktl = NULL; | |
403 | ||
404 | while(!pktl) { | |
405 | WaitForSingleObject(ctx->mutex, INFINITE); | |
406 | pktl = ctx->pktl; | |
407 | if(ctx->pktl) { | |
408 | *pkt = ctx->pktl->pkt; | |
409 | ctx->pktl = ctx->pktl->next; | |
410 | av_free(pktl); | |
411 | } | |
412 | ResetEvent(ctx->event); | |
413 | ReleaseMutex(ctx->mutex); | |
414 | if(!pktl) { | |
415 | if(s->flags & AVFMT_FLAG_NONBLOCK) { | |
416 | return AVERROR(EAGAIN); | |
417 | } else { | |
418 | WaitForSingleObject(ctx->event, INFINITE); | |
419 | } | |
420 | } | |
421 | } | |
422 | ||
423 | ctx->curbufsize -= pkt->size; | |
424 | ||
425 | return pkt->size; | |
426 | } | |
427 | ||
428 | static int vfw_read_close(AVFormatContext *s) | |
429 | { | |
430 | struct vfw_ctx *ctx = s->priv_data; | |
431 | ||
432 | if(ctx->hwnd) { | |
433 | SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0); | |
434 | SendMessage(ctx->hwnd, WM_CAP_DRIVER_DISCONNECT, 0, 0); | |
435 | DestroyWindow(ctx->hwnd); | |
436 | } | |
437 | if(ctx->mutex) | |
438 | CloseHandle(ctx->mutex); | |
439 | if(ctx->event) | |
440 | CloseHandle(ctx->event); | |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
445 | AVInputFormat vfwcap_demuxer = { | |
446 | "vfwcap", | |
447 | "VFW video capture", | |
448 | sizeof(struct vfw_ctx), | |
449 | NULL, | |
450 | vfw_read_header, | |
451 | vfw_read_packet, | |
452 | vfw_read_close, | |
453 | .flags = AVFMT_NOFILE, | |
454 | }; |